Extrusion Punch For Sheet Metal

Hole punch sheet metal vinyl plastic.

Extrusion punch for sheet metal.

In sheet metal extrusion a tool is used to punch a hole and extrude the material downward at the same time. A normal punch stroke shears metal and creates a slug. But the material also can be forged upward often by as much as 50 percent of the material thickness by stopping the punch stroke before the metal fractures and shears off as a slug. Use twice the punching force of standard extended reach punches to make holes in structural steel channels and angle iron.

The punch is then. Relieve the punch after extruding the straight section to allow for lubricant to settle into the negative portion of the punch. To setup the punch first drill a pilot hole into a piece of sheet metal with a step drill bit. I have a need of creating a folded sheet metal which has few punches in it.

This can be used to create holes for self tapping sheet metal screws or machine screws and it reduces the need for secondary operations. Heavy dutyextended reach bench mountlever operated hole punches. The hp18kr hole punch does the work of more expensive bulkier punches faster and easier. Extrusions our commonly used to accept sheet metal screws or permit tapping into a deeper distance than just the material thickness.

Metal sheet extrusion punch fold hello. A pre punched hole is required as a one hit pierce and extrude gives poor hole quality and has limited adjustment on the machine. When i do the folding parts where the punches are made seems not to be connected to the sheet metal. Unipunch custom metal fabrication c frame punching units will increase throughput reduce changeover time and enhance overall quality.

Use the malco hp18kr for making holes along the edge of sheet metal and vinyl plastic including rivet or screw fastener holes in metal ductwork and vinyl window extrusions or hog ring holes for attaching signs or bumpers to chain link fences or equipment cages. Place the die over the draw stud before inserting the stud through the pilot hole. Unipunch tooling can be used to simultaneously punch a hole and extrude the material down. The punch should be polished linearly to a mirrorlike surface finish.

Fabricators usually use cold forge embossing to create text and designs on the sheet metal surface. Applications include for self tapping sheet metal screws or in thicker material to permit tapping for machine screws. Die buttons with oversized internal diameters typically with a 020 radius instead of a cutting edge are used to permit the material to flow downward and punch an extruded hole.